There is no fixed theme for the Custom-Kitbash contest, so whatever theme
your Custom or Kitbash has, it's eligible. It must be Transformers
related.

Here are the rules:

1. Do not put your name anywhere on or near the Custom or Kitbash. Each
will get a number for the public to vote for.
2. Do not show your Custom or Kitbash anywhere prior to the contest. No
mention of its name or series (Animated, Movie, Prime, etc.) either.
3. All participants must check-in at the cash booth until 10:30am at the
latest. All participants must remain present until after the winner was
announcend.
4. You must stand up and pose your Custom or Kitbash for display yourself
and also remove it after the contest. So there is no risk of damaging your
work, by accident.

You can pre-register to participate in the contest here in this topic. We
hope to see lots of participants. The C.O.N.S. team wishes you all lots of
fun in the Custom-Kitbash contest and we're looking forward to seeing your
works at C.O.N.S. IX.